Add unzip for wasm CI jobs

images/debian.dhall

@@ -15,7 +15,7 @@ let
 let
   Image = ../Image.dhall
 
-let 
+let
   docker_base_url: Text = "registry.gitlab.haskell.org/ghc/ci-images"
 
 let
@@ -57,6 +57,8 @@ let
     , "systemtap-sdt-dev"
     -- For lndir
     , "xutils-dev"
+    -- For wasm CI jobs
+    , "unzip"
     ]
 
 let
@@ -141,7 +143,7 @@ let
             merge { Some = \(_: Llvm.Source) -> [ "LLC=${bootLlvmDir}/bin/llc", "OPT=${bootLlvmDir}/bin/opt" ]
                   , None = [] : List Text
                   } opts.bootstrapLlvm
-            
+
         let
           image =
             CF.from opts.fromImage